Cambridge Filter Corporation

Other

Roger T Goulet

Peter J Gualtieri

Joseph DeYulio

Joseph Cutri

An air filter unit of the HEPA type having a filter core of zig-zag folded media enclosed by a four-sided frame having two side casings and two end casings. Each end casing includes a recess extending into the inwardly facing surface thereof and bounded on all four sides by marginal edge portions of the end casing. The end flaps of the folded media are adhesively secured to the inwardly facing surfaces of the side casings and the recesses in the end casings are filled with an adhesive initially in a flowable state and hardenable to a solid state. The zig-zag edges of the folded media are disposed entirely within the adhesive, as are tenons extending from the ends of the side casings, thereby forming a mortise type joint between the side and end casings. A plurality of channels, preferably of dove tail cross section, extend across and communicate with the recesses in the end casings.

HEPA air filter for high temperature environments and method of

A HEPA-type, downflow air filter module is disclosed, having a damper supported upon a hollow tube for adjustable movement relative to an opening through which air enters the enclosed chamber or plenum above the filter media. The hollow damper support tube is axially aligned with a passageway between upstream and downstream sides of the center board which conventionally separates the media core into two halves in such filter modules. The passageway is normally sealed by a plug which may be removed from the downstream side of the module for measuring and adjusting air flow into the module, as controlled by the position of the damper which may be adjusted while air flow is being measured. The filter construction also permits leak testing of the filter by injection of test smoke from the downstream side, through the center board passageway and hollow damper tube, with simultaneous monitoring of the smoke concentration on the upstream side, thereby insuring that the desired level of smoke concentration on the upstream side of the media is reached prior to scanning the downstream side for the presence of particles to detect leaks.

Method for leak testing air filters

Downflow air filter construction and methods for air flow adjustment and

Apparatus for sensing the total pressure of a fluid flowing through a duct by a plurality of open-ended impact tubes fixedly arranged in a transverse plane of the duct and connected to a common manifold tube. Flow straightening means upstream of each sensing tube are provided by individual straightener tubes, open at both ends and arranged axially in the direction of fluid flow, in association with each sensing tube. The straightener tubes extend upstream from the ends of the impact tubes by a distance equal to at least eight times the transverse dimension of the straightener tube. In the preferred embodiment, separately manifolded static pressure sensing tubes are also provided, and serve as support means for the straightener tubes.

Fluid pressure sensing apparatus

Apparatus for permanent installation in a heating or air conditioning duct to sense total and static pressure of air flowing therethrough. A plurality of manifolds are arranged within the duct to sense total pressure at a number of selected locations in a transverse plane of the duct. The plurality of manifolds communicates with a connecting manifold either directly or through sensing tubes arranged axially within the manifold tubes. Static pressure is also sensed at a plurality of preselected locations in the duct and communicated to at least one additional manifold tube arranged within the duct. Total and static pressure are communicated through single openings in the duct well for attachment exteriorly thereof to an appropriate measuring instrument.

Growing community of inventors

Liverpool, NY, United States of America

Roger T Goulet